1375 results about "Feed pump" patented technology

The invention relates to methods of improving protein production, e.g., large-scale commercial protein production, e.g., antibody production, utilizing a modified fed-batch cell culture method comprising a cell growth phase and a polypeptide production phase. The modified fed-batch cell culture method combines both cell culture perfusion and fed-batch methods to achieve higher titers of polypeptide products. Because the modified fed-batch cell culture method of the invention produces higher polypeptide product titers than fed-batch culture alone, it will substantially improve commercial-scale protein production. The invention also relates to a perfusion bioreactor apparatus comprising a fresh medium reservoir connected to a bioreactor by a feed pump, a recirculation loop connected to the bioreactor, wherein the recirculation loop comprises a filtration device, e.g., ultrafiltration or microfiltration, and a permeate pump connecting the filtration device to a permeate collection container.

A desalination system is driven by a solar powered boiler that outputs a pressurized vapor to drive an expander that generates output motive force. A pump is responsive to the motive force to output pressurized saline water. A reverse osmosis unit receives the pressurized saline water to output fresh water and pressurized brine. A recuperator that transfers heat from the expander exhaust to the boiler feed liquid is incorporated to improve the efficiency of the system. In a particular embodiment, a hydraulic motor receives the pressurized brine and outputs an augmenting motive force to the pump. In another embodiment, a novel motorless boiler feed pump is defined.

The invention discloses a system and a method for using sintering waste heat to generate electricity and belongs to the technical field of sintering waste heat electricity generation of the steel works. The system comprises a sintering machine, a hot gas outlet pipe, a gas waste heat boiler, a main exhaust fan, a ring cooling machine, a first and second stage heat waste gas collecting pipe, a waste gas heat boiler, a draught fan, a circulating fan, a chimney, a low pressure steam drum, a middle pressure steam drum, a feed pump, a pressure reducing valve, a collecting header, a steam turbine, a generator, a condenser and a condensate pump. The invention realizes utilizing the waste heat of the non-desulfurization flue header of the sintering machine without arranging an inducing fan by reasonably designing the hot gas connecting mode of the air box at the tail part of the sintering machine and the gas resistance of the waste gas heat boiler. First and second stage sealing covers of the ring cooling machine are uniformly provided with a plurality of waste gas branch pipes so as to realize uniform distribution of the waste gas pressure in the sealing covers and reduce air leakage. Part of waste gas is adopted to circulate to improve the temperature of the waste gas. Compared with the existing system for using sintering waste heat to generate electricity, the system of the invention sufficiently uses the waste heat of the sintering system, improves the waste heat generated energy and reduces the operation cost.

A method for generating power, comprising the steps of: a) providing a Rankine Cycle device that includes a plurality of turbo-generators, each including a turbine coupled with an electrical generator, and at least one of each of an evaporator, a condenser, and a refrigerant feed pump; b) disposing the one or more evaporators within an exhaust duct of a power plant of a marine vessel; c) operating the power plant; and d) selectively pumping refrigerant through the Rankine Cycle device.

The invention discloses a method and an apparatus for treatment of a concentrated reverse osmosis drainage through coupled forward osmosis and reverse osmosis. The method comprises the following steps that: a raw forward osmosis solution directly enters into a forward osmosis assembly, a concentrated reverse osmosis drainage is used as a driving solution for forward osmosis, water of the raw forward osmosis solution permeates a membrane, the concentrated reverse osmosis drain is diluted and then mixed with raw reverse osmosis water, then flows through a high-pressure pump and enters into a reverse osmosis assembly as inflowing reverse osmosis water, water penetrating to one side of the driving solution from the raw forward osmosis solution is recycled through reverse osmosis, and the concentrated reverse osmosis drainage is circulated as the driving solution for forward osmosis. The apparatus comprises a first feed pump, a second feed pump, the forward osmosis assembly, the high-pressure pump and the reverse osmosis assembly. According to the invention, the utilization rate of the concentrated reverse osmosis drain can be increased; pollution of the concentrated reverse osmosis drainage to the environment can be reduced; the method and the apparatus can also be used for liquid concentration and desalination, producing significant economic values; and the apparatus provided by the invention has the advantages of a small occupied land area, a compact structure, simple operation, low running cost and low energy consumption.

The invention provides a start-stop auxiliary device used in an integral reactor and a cold starting method of the integral reactor. An inlet of a starting separator is connected with an outlet conduit of a once-through steam generator, an outlet of the starting separator is connected with a main steam pipe through a steam valve, and a drain outlet is connected with a water storage tank. An outlet at the bottom of the water storage tank is connected with a circulating water pump, and one conduit at the outlet of the water storage tank is connected with a condenser through an outlet stop valve of the water storage tank, a water storage tank water level control valve and a thermoreduction and dropping device. The circulating water pump is connected with a water supply conduit at the inlet of the once-through steam generator through a circulating water-carrying control valve. A water feed pump is connected with the condenser, the water feed pump is further connected with the inlet conduit of the once-through steam generator through a main water feed valve and with the water storage tank through a cold water valve. The start-stop auxiliary device is capable of increasing the temperature and pressure of refrigerant in a first circuit when the reactor starts, starting pressure and starting flow of a second circuit are established effectively, phenomenon of unstable flow is avoided, working media and heat energy are recycled effectively, and starting time is shortened.

The invention relates to a spray coating method for preparing dielectric ceramic powder and the dielectric ceramic powder prepared. The spray coating method comprises the following steps: A. main crystal phase ceramic powder and modified metallic ion composite soluble inorganic salt precursor or sol are processed into slurry with good fluidity; B. the slurry in the step A is prepared by deionized water into slurry with a solid content between 5 and 70 percent; and C. the slurry obtained in the step B is stirred and simultaneously conveyed to a spray drier by a feed pump, the feed rate is controlled to between 0.01 and 6.01 liters per minute, and the dielectric ceramic powder required is prepared after spray drying of the slurry at a hot blast temperature of between 120 and 450 DEG C; or D. the dielectric ceramic powder obtained in the step C is placed into a high temperature furnace at a temperature of between 250 and 1200 DEG C for calcinating 0.5 to 6 hours. The method is economic and simple; doped compositions and main crystal phase materials are uniformly distributed; and prepared dielectric powder crystal grains reach submicron or nano level and have superhigh evenness and dispersity.

The invention relates to a diagnosis and detection method and a device for an electromagnetic valve used for an electrically controlled common rail fuel feed pump. The method is characterized in that control parameters predetermined by test is input by a monitor program, current waveform during the drive of the electromagnetic valve is detected in real time and curve fitting is conducted; accordingly, the characteristics of the electromagnetic valve are judged, the movement circumstances when turning-on and shutting-down of the electromagnetic valve delays are measured and then whether the electromagnetic valve has the fault of deadlocking or open circuit can be analyzed. When the electromagnetic valve diagnosis and detection device is in use, no fuel injection pump test stand is needed; the use of the device can improve the consistence of the performance of the fuel feed pump electromagnetic valve, thereby greatly improving the performance and reliability of a common rail fuel injection system. The electromagnetic valve detection device has the advantages of low manufacture cost, convenient use, good self-diagnostic function and easy implementation in mass production.

A fuel feed system capable of feeding a fuel to fuel injection valves at a fuel pressure with improved stability is provided. A fuel feed system for an internal combustion engine including a fuel tank and a low-pressure pump for feeding the fuel in the fuel tank to fuel injection valves, is provided with a diaphragm type damper having a wave-shape cross section at a position in contact with the fuel. Also, in a high-pressure fuel feed pump including a pressurizing chamber for pressurizing the fuel, a plunger for pumping the fuel within the pressurizing chamber, an intake valve provided at a fuel inlet of the pressurizing chamber, a discharge valve provided at a fuel outlet of the pressurizing chamber, and a low-pressure chamber provided in an upstream of the intake valve, a mechanism for reducing fuel pressure pulsation is disposed in a space of the low-pressure chamber provided in the upstream of the intake valve, and a fuel pressure sensor for measuring the fuel pressure is mounted near the mechanism for reducing fuel pressure pulsation.

The invention discloses an airlift type internal circulation intermittent aerobic granular sludge reactor, which comprises an organic glass column, a temperature controller, a water inlet tank, an aeration pump, a water feed pump, a draining pump, a flow meter, a programmable logical controller, etc. The main body of the reactor is the organic glass column and can be divided into an inner sleeve and an outer sleeve, and the inner one is an upspout, while the outer one is a downcast pipe; the ratio of height to diameter is 15. The exterior of the downcast pipe is provided with a water bath heating casing for controlling reaction temperature. Mixed liquor in the reactor flows between the upspout and the downcast pipe in internal circulation to endow granular sludge with a self-balanced micro-ecosystem, the property of the micro-ecosystem is suitable for an up-flow type wastewater treatment system. The reactor adopts the sequence batch operation mode and can realize automatic control by the programmable logical controller. The reactor of the invention has the advantages of flexible operation, compact structure, little sludge remained, good treatment effect, and the like, and can bear high volume load and impact load; furthermore, the reactor has small occupying space and can reduce pork barrel due to relatively large H/D.

The invention discloses a high temperature valve detecting and testing system, comprising an oil feed pump, an oil storage tank, a pressure pump, a buffer tank, a detecting device and a condensing device, wherein an electric heater and a pressure transmitter are installed on the top part of the oil storage tank; the bottom part of the oil storage tank is connected with the buffer tank through a third trunk pipeline; another pressure transmitter and a temperature sensor are installed on the inner side wall of the buffer tank; the buffer tank is connected with an oil inlet of a to-be-detected valve through a fourth trunk pipeline; the detecting device comprises a detecting table and a torque testing device; the valve rod of the to-be-detected valve is connected with the torque testing device; and the oil outlet of the to-be-detected valve is connected with the oil storage tank through a fifth trunk pipeline, the condensing device and a second trunk pipeline in sequence. The high temperature valve detecting and testing system is simple in structure and convenient to operate; and by the adoption of the detecting and testing system, the resistance coefficient and the torque performance of a high temperature valve and the flow characteristic can be tested, and the leakage amount can be detected.

A scroll device including two coupled stages on a rotary shaft, at both ends of an intermediate electric power device, wherein the first stage is formed by a first pressure variation device of an operating fluid, comprising a scroll case containing a fixed scroll and a mobile scroll relatively to the case, and with admission and outlet ports, and wherein the second stage is a feed pump which pumps the operating liquid and provides it in return.

A fuel filter is located downstream of a feed pump to filter fuel discharged from the feed pump. An orifice is located between the fuel filter and a suction quantity control valve to restrict a flow rate of the fuel passing through the fuel filter. A positive pressure of the feed pump is applied to the fuel filter, and a passing pressure at the fuel filter increases. Even if viscosity of the fuel increases and the fuel becomes wax-like at low temperature, clogging of the fuel filter or an insufficient flow rate can be inhibited. The orifice restricts the flow rate of the fuel passing through the fuel filter. Accordingly, an increase in size of the fuel filter can be prevented even if the fuel filter is located downstream of the feed pump.

In a common rail type fuel injection system, fuel in a fuel tank is sucked by a feed pump and fed to a pressurizing pump. Fuel pressurized in the pressurizing pump is supplied to a common rail. The pressurized fuel accumulated in the common rail is injected into a cylinder of an internal combustion engine from an injector. All of these operations are electronically controlled by an electronic control unit. To gradually suck air in the fuel tank together with fuel and to avoid air accumulation in a fuel filter, a relief valve is connected to the common rail. The relief valve is opened when the engine is idling thereby to increase an amount of fuel sucked by the feed pump and to gradually suck the air together with the fuel. The relief valve is opened only in interval periods in which fuel is not injected from the injector.

A small-scale dynamic simulator for crude oil refinery desalters has a pressurized oil deviblis configured to hold a supply of crude oil and a water deviblis configured to hold a supply of wash water. At least one chemical feed pump selectively adds emulsion breaker chemicals to the desalter simulator and a low shear metering pump is configured to pump crude oil and wash water through the desalter simulator. An emulsion forming device forms a crude oil-wash water emulsion that is then received in a desalter vessel. The desalting vessel is fitted with electric grids which simulate those found in electric desalters. The emulsion is resolved within the desalter vessel with the assistance of the emulsion breaker chemicals so the wash water and crude oil form distinct phases, with substantially desalted crude oil removed from an upper portion of the desalter vessel and substantially oil-free wash water removed from a bottom portion of the desalter vessel. A portion of the desalter vessel is substantially transparent to allow visualization of the demulsification process and at least one light source is positioned adjacent to the desalter vessel to aid in visualization of a rag layer formed in the desalter vessel. A heated jacket surrounds the desalter vessel to maintain the desalter vessel at the desired temperature.

The invention discloses a deep peak shaving system of a thermal power plant. The deep peak shaving system comprises a superheater, a reheater, a high-pressure cylinder, a reheating steam electric regulating valve, a main steam electric regulating valve, a medium-pressure cylinder, a low-pressure cylinder, a condenser, a condensation water pump, a low-pressure heating water feeding heat exchanger,a water feeding pump set, a deaerator, a high-pressure heating water feeding heat exchanger, a steam turbine low-pressure steam extraction system, four-stage extraction, a steam turbine high-pressuresteam extraction system, a high-temperature molten salt water feeding heat exchanger, a high-temperature molten salt pump, a high-temperature molten salt storage tank, a low-temperature molten salt storage tank, a low-temperature molten salt pump, a molten salt preheater, a steam condensation type heat exchanger, a steam non-condensation type heat exchanger, a steam pressure reduction device and the like. According to the system, the molten salt heat storage technology is utilized, redundant steam heat is stored during load reducing peak shaving of a unit, in the process of load increasing peak shaving of the unit, high-temperature molten salt is used for heating high-pressure fed water to reduce steam extraction of a steam turbine, the output of the steam turbine is increased, the heat efficiency of the unit is improved, and the flexible and deep peak shaving of the thermal power plant is realized.

A feed pump of a fuel supply system for a DME engine rotates in a normal direction to supply DME fuel in a fuel tank to a high-pressure supply pump through a low-pressure fuel supply passage. The high-pressure supply pump pressurizes the DME fuel and discharges the DME fuel therefrom. The discharged DME fuel is distributed by a high-pressure fuel supply passage and injected by a fuel injector. A first fuel recovery passage connects the high-pressure fuel supply passage to the low-pressure fuel supply passage. When the engine is operated, a first solenoid valve closes the first fuel recovery passage. When the engine is stopped, the first solenoid valve opens the first fuel recovery passage and the feed pump rotates in a reverse direction, thereby the DME fuel in the low-pressure fuel supply passage and in the high-pressure fuel supply passage is recovered into the fuel tank.

The fuel injection system has a high-pressure pump, by which fuel is pumped into a reservoir, with which injectors disposed on cylinders of the engine communicate. A feed pump pumps fuel out of a fuel tank to the high-pressure pump and a fuel metering device triggered by a control unit and disposed between the feed pump and the high-pressure pump controls the fuel quantity delivered to the high-pressure pump. The fuel metering device is formed by a clocking valve, which is opened and closed in pulse-width-modulated fashion by the control unit, and the fuel quantity delivered to the intake side of the high-pressure pump is proportional to the opening duration of the clocking valve.

The invention discloses a coal-fired power generation and waste heat power generation coupling system for a private station of a cement kiln, comprising a coal-fired boiler, a kiln head waste heat boiler, a kiln tail waste heat boiler, a kiln head steam pocket, a kiln tail steam pocket, a condensing steam turbine, a condensate pump, a heater, a deaerator, a water feeding pump and related auxiliary devices, wherein the kiln head waste heat boiler utilizes a dual-pressure system; a primary economizer of the low-pressure system is used as a public economizer for the waste heat power generation; the high-pressure steam and the steam generated by the kiln tail waste heat boiler are collected to the main steam pipeline of the waste heat power generation system; one path of the main steam pipeline is connected with a steam turbine of the waste heat power generation system while the other path thereof is connected with non-adjustable extraction steam of a coal-fired steam turbine; one path ofthe main steam pipeline of the coal-fired unit is connected with the coal-fired steam turbine while the other path thereof is connected with the waste heat steam turbine. In the invention, the coal-fired power generation is rationally coupled with waste heat power generation system so that the problem that the stability of the waste heat power generation system of the cement kiln is low is solved, and the whole thermal circulating efficiency of the private station can be largely increased.